Occupy Wall Street supporter Russell Simmons was quick to make amends after he and a brunette model briefly occupied a bathroom stall together at a glamorous Fashion Week party.

The mega-millionaire music and fashion mogul — who’s now single after splitting with actress Melissa George — was spotted in the unisex bathroom during Monday’s party for Vs magazine hosted by Helena Christensen, Nur Khan and One Model Management at the Dream Downtown hotel’s Electric Room.

Our eyewitness told us: “Russell was in the bathroom talking to the many models coming in and out. He left, and then he came back with this one brunette. He playfully led her into one of the bathroom stalls and closed the door,” the source continued.

Our witness watched as the hotel’s bathroom attendant spied Simmons and the woman enter the stall together, and banged on the door, declaring, “One at a time.”

After a minute, according to our witness, they emerged. Soon after, Simmons came back to the bathroom alone, made eye contact with the attendant and pointedly put several bills in the tip jar.

The vegan Def Jam founder has been sober for years, so we can only assume the bathroom break was to get to know the model better.

Simmons split with George last month after about a year of dating. A source confirmed to Page Six, “She has met someone else, and they are very happy. She and Russell remain friends and still keep in touch with each other.”

After we asked his reps about the breakup, Simmons took to his Twitter feed yesterday to confirm it. He wrote: “Long distance relationships are to say the least difficult. For me & melissa a few weeks ago . . . We agreed impossible,” he wrote.

Simmons told us through a rep, “The . . . account of last night sounds like a lot of fun, but it is absolutely, completely false.”